本地保存搜索记录的简单实现

SearchHistory.png

- (void)loadHistory
{
    self.historyArray = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] arrayForKey:@"searchHistoryArray"]];
    [self .tableView reloadData];
}
- (void)saveHistory
{
    // 防止重复数据
    if (![self.historyArray containsObject:_searchField.text]) {
        [self.historyArray insertObject:_searchField.text atIndex:0];
        // 保存10条
        if(self.historyArray.count > 10) {
            [self.historyArray removeLastObject];
        }
        [[NSUserDefaults standardUserDefaults] setObject:self.historyArray forKey:@"searchHistoryArray"];
    }
}